Butshake 

When you'v done a girl in the pooper, you pour in some milk and throw in a straw. then you wait for her ass to close up and use the straw to drink the milk.

-Hey dude, i did a butshake on jennifer yesterday!
-Aw dude, that's just sick man! Was it good?
-na, tasted like poop

Butshake by hiddennnnnnnnnnn February 22, 2009

Minah Buttshake 

A minah buttshake is when the molecules of cellulite from the bottom of her Thermophilus Stretpticious , more commonly known as pantat moves to the top in a rigorous motion causing stimulus in most male mamalia's penisitus.

I'm gonna get a minah buttshake tonight.

Minah Buttshake by xenovon February 2, 2009

bumshake 

wen u skake a bottle containing out of date pineapple juice and it makes a froth similar to a shake but from ur bum.

oh danm i gt bumshake all down my new top.

bumshake by sophie-0x February 23, 2008